﻿<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title></title>
</head>
<body>
    <script>
        /* 
          数组去重 ['blue', 'green', 'blue'] 要求去除数组中重复的元素。
          1. 遍历数组
          2. 判断当前元素是否存在新数组
          3. 添加
      */
        var arr = ['blue', 'green', 'blue'];
        var newArr = new Array();
        for (var i = 0; i < arr.length; i++) {

            if (newArr.indexOf(arr[i]) == -1) {
                newArr.push(arr[i]);
            }
        }

        console.log(newArr);
    </script>
</body>
</html>